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The CEF "run what you brung" prop rod build

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The CEF "run what you brung" prop rod build

Post  crankbndr on Sun Oct 11, 2015 5:01 pm

So far all I got going is an 3.5" aluminum tube, engine and wheels.
and a rough outline of the "Green Monster". Time to start cutting.
For some reason the photo makes the body look shorter than it is.









Last edited by crankbndr on Mon Oct 12, 2015 4:00 pm; edited 1 time in total
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Re: The CEF "run what you brung" prop rod build

Post  dckrsn on Sun Oct 11, 2015 8:49 pm

I like it! At first I thought it was a tube chassis. drunken
Bob
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Re: The CEF "run what you brung" prop rod build

Post  KariFS on Mon Oct 12, 2015 1:36 am

How about a ducted fan setup, since you already have the duct as a part of the chassis Smoking
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Re: The CEF "run what you brung" prop rod build

Post  Marleysky on Mon Oct 12, 2015 3:28 pm

KariFS wrote:How about a ducted fan setup, since you already have the duct as a part of the chassis Smoking

That was my first thought also, Ducted Fan...also, somewhere Back in time I had a Co2 powered racer. Blew threw a whole bunch of Co2 cartridges, that I could have used in my BB gun.  Could try that again, or some of those Estes rocket motors!
JATO racer...whoosh!  ( Indy car emoticon) United States
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Re: The CEF "run what you brung" prop rod build

Post  crankbndr on Mon Oct 12, 2015 4:05 pm

Ducted fan would be cool, I don't know much about them. Could maybe stuff a battery fan in the tube.
I wanted to run it with a Cox engine though. They still sell ramjets don't they?
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Re: The CEF "run what you brung" prop rod build

Post  crankbndr on Mon Oct 12, 2015 4:14 pm

I need to make some kind of chassis to carry the axles and tube.

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Re: The CEF "run what you brung" prop rod build

Post  roddie on Mon Oct 12, 2015 7:55 pm

Oh.. the wheels are turning! I'm thinking you could cross-slot the bottom of the tube using a miter-saw.. for the axles to fit up into. If it's a tether car, figure out the radius you'll be running.. and angle the slots; so that the axles track into the circle. Secure the axles with legs made from sheet metal strips.. that will follow the body-tube's contour, when screwed-on vertically. The body-tube will support the axle from fore/aft movement.. so the legs need only level the axles, establish their height and hold them captive from dropping out the bottom. You could easily trick this approach out.. by slotting the sheet metal.. where it wraps around the tube.. allowing you to set body-camber and lean the car into the circle.

As for ducted-fans.. you can still find these.. I believe it's a Kress unit. Search Kress Axiflow RK-049.



I don't know if that duct-tube comes with this kit shown below.





I see the "Midwest" name on this kit.. but I remember when Kress had their ads for this design in the model airplane magazines.. years ago. I wanted one.


Last edited by roddie on Mon Oct 12, 2015 8:21 pm; edited 1 time in total (Reason for editing : clarification)
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Re: The CEF "run what you brung" prop rod build

Post  crankbndr on Tue Oct 13, 2015 8:41 am

Thanks Roddie, I got one for ya. I need to get symmetrical lines length ways on the tube every 90 degrees for top, bottom and the sides.
If the first line has any twist in it all the others will be off. Huh...
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Re: The CEF "run what you brung" prop rod build

Post  pkrankow on Tue Oct 13, 2015 9:16 am

crankbndr wrote:Thanks Roddie, I got one for ya. I need to get symmetrical lines length ways on the tube every 90 degrees for top, bottom and the sides.
If the first line has any twist in it all the others will be off. Huh...

Use a bracket.
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Who's got that?

Post  VUgearhead on Tue Oct 13, 2015 9:20 am

These are manufactured anymore that I know of. I would dearly love to see an exploded view of one of these and maybe the install instruction posted.

You know, for educational purposes only, of course!
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So what are the rules?

Post  happydad on Sun Nov 01, 2015 3:16 am

crankbndr wrote:So far all I got going is an 3.5" aluminum tube, engine and wheels.
and a rough outline of the "Green Monster". Time to start cutting.
For some reason the photo makes the body look shorter than it is.





So what and where are the rules? Can I enter anything with Cox engines? Can I enter this Cox driven car?


Cox Engine Test Stand Car

Is it Legal?   lol!

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Re: The CEF "run what you brung" prop rod build

Post  crankbndr on Thu Nov 05, 2015 10:05 am

The rule book is complex and cluttered but the first rule is,
THERE ARE NO RULES!!
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Re: The CEF "run what you brung" prop rod build

Post  crankbndr on Thu Nov 05, 2015 10:17 am

My first attempt at building a chassis to carry the tube was a big fail, it is not near rigid enough. The aluminum chassis on the Cox Prop Rod is very rigid, strong.
Back to the drawing board with heavier angle and plate. I started out thinking of TD .049 power, then thought it too heavy and maybe an .09 would better.
Then I thought if an .09 is good a TD .15 would be great, I'm running off the rails here. lol!



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Re: The CEF "run what you brung" prop rod build

Post  Marleysky on Thu Nov 05, 2015 10:44 am

crankbndr wrote:The rule book is complex and cluttered but the first rule is,
THERE ARE NO RULES!!

Are we going for speed?  Or destructive capabilities?  On my watch list:
http://www.ebay.com/itm/121804101408?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
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Re: The CEF "run what you brung" prop rod build

Post  crankbndr on Thu Nov 05, 2015 10:52 am

That looks like something out of Road Warrior!! lol!

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Re: The CEF "run what you brung" prop rod build

Post  Davenz13 on Fri Nov 06, 2015 3:08 am

lol! Wouldn't have looked out of place with Sergeant Blast and Private Meekly in place of the Army Surplus Special #6 on Wacky Racers
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On my bid list

Post  happydad on Fri Nov 06, 2015 3:11 am

crankbndr wrote:That looks like something out of Road Warrior!! lol!


On my bid list. Mine. lol!

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Re: The CEF "run what you brung" prop rod build

Post  Davenz13 on Mon Nov 09, 2015 12:03 am

happydad wrote:
crankbndr wrote:That looks like something out of Road Warrior!! lol!


On my bid list. Mine. lol!

happydad Futaba Radio Jeep

I see it went for US$10.50. Did you get it happydad?
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Nope

Post  happydad on Mon Nov 09, 2015 12:23 am

Davenz13 wrote:
happydad wrote:
crankbndr wrote:That looks like something out of Road Warrior!! lol!


On my bid list. Mine. lol!

happydad Futaba Radio Jeep

I see it went for US$10.50.  Did you get it happydad?

Someone sniped me in the last 10 seconds. I wish I new how they did it. It would save a lot of watching and waiting.
oh well. I still have my yellow Shrike with extra engine coming.

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Re: The CEF "run what you brung" prop rod build

Post  Marleysky on Mon Nov 09, 2015 7:52 am

Wow,  that went for less than what the engine is worth by itself!!  Had to be won by a sniper as the bid came in 11 seconds before the close of the auction, and only .50 more than your bid. I looked and looked at it on my watch list. Decided it was a cool piece, but I really didn't need something else taking up shelf space (darn common sense takin over). Sorry you didn't win. Sad
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Re: The CEF "run what you brung" prop rod build

Post  crankbndr on Sun Nov 15, 2015 7:35 am

After much cutting, fileing, sanding, filling, pop riveting, drilling and a trip to the eye doctor ( table saw shot a tiny piece of aluminum into my eye even with safety glasses on) I have a rolling chassis.
Going to fill in and shape the sides with balsa and mount a TD .15 and the vertical stab in the tail somehow. The fuel tank I haven't figured out yet, it needs to be small, mounted in front of the engine
and part of vert. stab.



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Re: The CEF "run what you brung" prop rod build

Post  getback on Sun Nov 15, 2015 8:21 am

That cylinder needs flames shooting out the back !! TD 15 should get,R going moving . Whats that screw coming out the back? holding ? Heck there is a Jeep Or truck one under a bush out in my yard I should pull it and have a thought . getback Huh...
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Re: The CEF "run what you brung" prop rod build

Post  Marleysky on Sun Nov 15, 2015 11:14 am

Safety First! Even with safety goggles you got stuff in your eye, aluminum too. Man,  I use to use pencil magnets to remove "Muffler Dust" from my eyes after working on cars exhaust system, that would not work with aluminum...Owch!
  Just got my tires back from the Balancer....says they're  good up to 15 MPH: We'll see.  Co2 or Estes Jet pack in the design stage:
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2 cox engines, 1 pusher and 1 puller

Post  happydad on Sun Nov 15, 2015 2:31 pm

Marleysky wrote:Safety First! Even with safety goggles you got stuff in your eye, aluminum too. Man,  I use to use pencil magnets to remove "Muffler Dust" from my eyes after working on cars exhaust system, that would not work with aluminum...Owch!
  Just got my tires back from the Balancer....says they're  good up to 15 MPH: We'll see.  Co2 or Estes Jet pack in the design stage:

try 2 cox engines, 1 pusher and 1 puller. it should really fly.

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Re: The CEF "run what you brung" prop rod build

Post  dckrsn on Sun Nov 15, 2015 2:57 pm

Yabba-dabba-dooooooo!!!



Bob
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Re: The CEF "run what you brung" prop rod build

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